The Serbian collected The Boodles trophy following the traditional one-off exhibition match after beating Dutchman Haase 7-5 6-4.
The two treated the crowd to a highly-entertaining match, producing plenty of skill and inventiveness – something of which the fans are accustomed to at the showpiece event.
“I’ve played this event a couple of times already and I really enjoy it. It’s great preparation for Wimbledon. It’s also a lot of fun and a great facility,” said Troicki.
“This was the perfect warm-up for my first round match at Wimbledon.”
And despite losing the match, Haase was in good spirits, stating that the tournament is always a good warm-up for Wimbledon which starts on Monday.
“It’s always nice to come here. Only the top guys in world play here,” said Haase.
“We were joking around a few times but we both wanted to win, so I think the points were actually pretty good. It was nice to play another match on grass here. It’s good to have a few matches under your belt on grass. Wimbledon is the biggest tournament and the most famous tournament in the world, so you come here and try to get as much confidence as you can.”
Home-favourite Jamie Delgado was also victorious; winning his doubles match with partner James Cerrentani as the pair beat Canadians Raneez Junair and Adil Shamasdin 10-5 in their –first-to-ten-games shoot-out.
Elsewhere, Argentinean Horacio Zeballos looked right at home as he beat Thiemo De Bakker 7-5 6-4.